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Vulnerability · Published Sep 16, 2026 · Assigned by Linux

CVE-2026-90021usb: gadget: f_midi: initialize work in f_midi_alloc()

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 88.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_midi: initialize work in f_midi_alloc() f_midi_alloc initializes free_ref to 1 and it can only be incremented when a sound card is registered via f_midi_register_card(). f_midi_register_card() is only called in f_midi_bind() which actually performs INIT_WORK. If f_midi_bind() is never run, work is not initialized and the if condition in f_midi_free becomes true, this results in a warning later in __flush_work as work->func = 0. Fix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-90021
Debian:13linux6.12.111-1DEBIAN-CVE-2026-90021
Debian:14linux7.2.6-1DEBIAN-CVE-2026-90021
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-90021
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90021
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-90021
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-90021
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-90021

Affected products (as reported)

VendorProductVersions
Linux Linux 8653d71ce3763aedcf3d2331f59beda3fecd79e4 – before c76e82b026a28c348e5d841922aa73db36eca1d38653d71ce3763aedcf3d2331f59beda3fecd79e4 – before 13e9f5a91360952b9b5bbc2367fc29d4a4ff28248653d71ce3763aedcf3d2331f59beda3fecd79e4 – before 3d8b11255e632170f32f1925bfcaf96331f363178653d71ce3763aedcf3d2331f59beda3fecd79e4 – before 02ac76f27db23ef652358458c272d9d2d6f511678653d71ce3763aedcf3d2331f59beda3fecd79e4 – before 858576de6b2f5166b08dae803f0fd0766dcb30028653d71ce3763aedcf3d2331f59beda3fecd79e4 – before 7e07d3e4c389217d7d7171d80edf2e23ac70f1ea89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d3635523e9b96213969693c320302d536774d8e9b
Linux Linux 5.12

References